fix: issue1178 (#1179)

src/lib/modal/Modal.svelte

@@ -124,27 +124,29 @@
   <div on:keydown={handleKeys} on:wheel|preventDefault|nonpassive use:prepareFocus use:focusTrap on:click={onAutoClose} on:mousedown={onOutsideClose} class={twMerge(dialogClass, $$props.classDialog, ...getPlacementClasses())} tabindex="-1" aria-modal="true" role="dialog">
     <div class="flex relative {sizes[size]} w-full max-h-full">
       <!-- Modal content -->
+
       <Frame rounded shadow {...$$restProps} class={frameClass}>
         <!-- Modal header -->
         {#if $$slots.header || title}
-          <Frame color={$$restProps.color} class="flex justify-between items-center p-4 rounded-t">
+          <Frame color={$$restProps.color} class="flex justify-between items-center p-4 rounded-t-lg">
             <slot name="header">
               <h3 class="text-xl font-semibold {$$restProps.color ? '' : 'text-gray-900 dark:text-white'} p-0">
                 {title}
               </h3>
             </slot>
             {#if dismissable}<CloseButton name="Close modal" on:click={hide} color={$$restProps.color} />{/if}
           </Frame>
-        {:else if dismissable}
-          <CloseButton name="Close modal" class="absolute top-3 end-2.5" on:click={hide} color={$$restProps.color} />
         {/if}
         <!-- Modal body -->
         <div class={twMerge('p-6 space-y-6 flex-1 overflow-y-auto overscroll-contain', $$props.bodyClass)} on:keydown|stopPropagation={handleKeys} role="document" on:wheel|stopPropagation|passive>
+          {#if dismissable && !$$slots.header && !title}
+            <CloseButton name="Close modal" class="absolute top-3 end-2.5" on:click={hide} color={$$restProps.color} />
+          {/if}
           <slot />
         </div>
         <!-- Modal footer -->
         {#if $$slots.footer}
-          <Frame color={$$restProps.color} class="flex items-center p-6 space-x-2 rtl:space-x-reverse rounded-b">
+          <Frame color={$$restProps.color} class="flex items-center p-6 space-x-2 rtl:space-x-reverse rounded-b-lg">
             <slot name="footer" />
           </Frame>
         {/if}